40005244, Marlborough, 190, Three heads, one bearded, with rams' horns, two youthful (one laureate). Possibly Zeus, Artemis and Apollo. Ground line., Unknown, Boardman, J., Scarisbrick, D., Wagner C., Zwierlein-Diehl, E: The Marlborough Gems (2009), Story-Maskelyne, M.H.: The Marlborough Gems (1870), no. 190, Sardonyx

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